Formulaire

Form : Object

Paramètres	Type		Description
Résultat	Object	←	Form data of the current form

Cette commande n'est pas thread-safe, elle ne peut pas être utilisée dans du code préemptif.

Historique

Release	Modifications
20 R8	Form class support

Description

The Form command returns the object associated with the current form (instantiated from the formData parameter or the user class assigned in the Form editor).The Form command returns the object associated with the current form (instantiated from the formData parameter or the user class assigned in the Form editor). 4D automatically associates an object to the current form in the following cases:

• the current form has been loaded by one of the DIALOG, Print form, or FORM LOAD commands,
• the current form is a subform,
• a table form is currently displayed on screen.

Commands (DIALOG...)

If the current form is being displayed or loaded by a call to the DIALOG, Print form, or FORM LOAD commands, Form returns either:

• the formData object passed as parameter to this command, if any,
• or, an instantiated object of the user class associated to the form, if any,
• or, an empty object.

Sous-formulaire

If the current form is a subform, the returned object depends on the parent container variable:

• If the variable associated to the parent container has been typed as an object, Form returns the value of this variable.
  In this case, the object returned by Form is the same as the one returned by the following expression:

 (OBJECT Get pointer(Object subform container))->  

• If the variable associated to the parent container has not been typed as an object, Form returns an empty object, maintained by 4D in the subform context.

For more information, please refer to the Page subforms section.

Table form

Form returns the object associated with the table form displayed on screen. In the context of an input form displayed from an output form (i.e. after a double-click on a record), the returned object contains the following property:

Propriété	Type	Description
parentForm	object	Form object of the parent output form

Exemple

Dans un formulaire affichant l'enregistrement d'une personne, un bouton ouvre un dialogue permettant de vérifier ou de modifier les noms et âges de ses enfants :

Note : Le champ objet "enfants" est représenté uniquement dans cet exemple afin de faire apparaître sa structure.

In the verification form, you have assigned some Form object properties to inputs:

Voici le code du bouton "Check Children" :

 var $win;$n;$i : Integer
 var $save : Boolean
 ARRAY OBJECT($children;0)
 OB GET ARRAY([Person]Children ; "children" ;$children) //obtient la collection d'enfants
 $save:=False //initialise la variable de sauvegarde
 
 $n:=Size of array($children)
 If($n>0)
    $win:=Open form window("Edit_Children";Movable form dialog box)
    SET WINDOW TITLE("Vérifier les enfants pour "+[Person]Name")
    For($i;1 ;$n) //pour chaque enfant
       DIALOG("Edit_Children" ;$children{$i}) //affiche la boîte de dialogue remplie de valeurs
       If(OK=1) //l'utilisateur a cliqué sur OK
          $save:=True
       End if
    End for
    If($save=True)
       [Person]Children:=[Person]Children //forces object field update
    End if
    CLOSE WINDOW($win)
 Else
    ALERT("No child to check.")
 End if

Le formulaire affiche des informations pour chaque enfant :

Si des valeurs sont modifiées et que l'utilisateur clique sur le bouton OK, le champ est mis à jour (bien entendu, l'enregistrement parent devra être sauvegardé par la suite).

Voir également

DIALOG